Process for the preparation of bead polymers of uniform...

Details Process for the preparation of bead polymers of uniform... Process for the preparation of bead polymers of uniform...

C - Chemistry, Metallurgy

08

J

18/503

C08J 3/12 (2006.01)

Patent

CA 1175619

ABSTRACT OF THE DISCLOSURE Process for the production of bead polymers of improved uniform particle size and uniform quality comprising a) producing droplets which have a uniform particle size from the monomer or polymerization mixture to be polymerized by spraying the monomer or polymerization mixture into a liquid (continuous phase) which is essentially immiscible with the monomer or poly- merization mixture, b) encapsulating these droplets of uniform size by shells which are stable under the polymerization conditions to be used and c) then polymerizing the encapsulated droplets, with the provision that the monomer or the polymerization mixture is sprayed into the continuously fed-in continuous phase, co-current with this phase; that the production of the droplets and the encapsulation thereof are undertaken in different regions of the reaction vessel; that the process steps a) and b) are carried out in such a manner that no forces which would alter the integrity of the droplets act on the droplets from their production until their encapsulation.

396673

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